Trump didn’t elaborate on where those plants would be located or when they would be built, the paper reported.

Cook said in May that Apple planned to create a $1 billion fund to invest in U.S. companies that perform advanced manufacturing. He also said the company intended to fund programs that could include teaching people how to write computer code to create apps.

Apple came under fire from Trump during his campaign because it makes most of its products in China.

“We’re gonna get Apple to start building their damn computers and things in this country, instead of in other countries,” Trump had said in a speech in January last year.

Apple, on its part, had been making disclosures to highlight how it had been contributing to job creation in the United States.

Cook said in February that Apple spent $50 billion in 2016 with its U.S. suppliers.

The world’s largest company by market valuation had also claimed that it created 2 million jobs in the United States, 80,000 of which are directly at Apple and the rest coming from suppliers and developers for the company’s app ecosystem.

Trump’s comments on Tuesday were some of the first he has made regarding Apple’s manufacturing since assuming the presidency.

“I said you know, Tim, unless you start building your plants in this country, I won’t consider my administration an economic success,” the Journal quoted Trump as saying.